The Safety Case Approach and Risk Summation
CSP written lesson, 7 min read. CSP Domain 2: Program Management
Written with AI help from the rules it covers, then fact-checked against them. Study aid, not site-specific safety advice. The official rule controls.
What you'll learn
- Describe the parts of a safety case and how it differs from a hazard list
- Explain direct and indirect evidence in a risk-informed safety case
- Sum individual hazard probabilities and compare the total to a tolerance
- Explain why the simple sum and the exact combined probability differ
What this lesson covers
This lesson explains the safety case approach (claims, arguments and evidence that a system is adequately safe) and risk summation (adding up individual hazard risks to judge total system risk). A worked example shows how three hazards that each pass a tolerance can fail it together.
This lesson is included with a pass
Written lessons come with every CSP pass, along with the video lessons, the question bank, mocks and the tutor. $80 per exam for 6 months, or $143 for all three for 12 months.
Try the free system safety: fault trees, FMEA and MIL-STD-882E practice questions